胶溶法制备超细二氧化钛

以ＴｉＣｌ４为原料,采用胶溶法制备超细ＴｉＯ２反应物浓度,胶溶剂用量,胶溶温度,表面活性剂用量等地胶溶和萃取过程的影响,摸索出胶溶法制备超细ＴｉＯ２的合理工艺条件。     

胶溶法制备超细二氧化钛

以ＴｉＣｌ４为原料,采用胶溶法制备超细ＴｉＯ２．研究反应物浓度、胶溶剂用量、胶溶温度、表面活性剂用量等因素对胶溶和萃取过程的影响．摸索出胶溶法制备超细ＴｉＯ２的合理工艺条件．     

纳米晶TiO2超细粉的研制

纳米晶ＴｉＯ２超细粉的研制尹荔松周歧发唐新桂林光明张进修（中山大学超细材料研究中心，广州５１０２７５）关键词纳米晶，溶胶－凝胶法，超细粉分类号ＴＱ１７４．７５８二氧化钛（ＴｉＯ２）是一种重要的无机功能材料，具有湿敏、气敏及光催化等功能，也是制备铁电...     

光化学反应制备纳米TiO2微胶粒及其性能

讨论了通过光化学反应在水介质中由Ｔｉ＾３＋离子制备纳米ＴｉＯ２微胶粒（１５￣２５ｎｍ）的实验方法;研究了光化学反应条件（温度、浓度、酸度等）对反应速率的影响;探讨了纳米ＴｉＯ２微胶粒的量子尺寸效应、电性及聚沉、稳定存在条件及光催化活性等性能,为研制超细ＴｉＯ２微胶粒子提供了实验方法和理论依据。     

超细TiO2的合成研究：溶胶—凝胶法

采用溶胶—凝胶法研制超细ＴｉＯ２,对反应的机理及影响因素进引了讨论。制得的超细ＴｉＯ２的粒径为８ｎｍ～２５ｎｍ。     

ZrO2—TiO2多孔陶瓷膜的制备研究

以Ｔｉ（ＯＣ４Ｈ９）４和Ｚｒ（ＮＯ３）．５Ｈ２Ｏ为前驱物，用Ｓｏｌ－ｇｅｌ方法制备了ＺｒＯ２－ＴｉＯ２多孔陶瓷膜，研究了不同Ｚｒ／Ｔｉ比和浓度对ＺｒＯ２－ＴｉＯ２干ｇｅｌ的影响，研究了不同Ｚｒ／Ｔｉ比和烧结过程对ＺｒＯ２－ＴｉＯ３多孔陶瓷膜结构的影响，制备了孔径小（约１８ｎｍ）孔径分布很窄，孔隙率较高（约３６％）面积较大的ＺｒＯ２－ＴｉＯ２多孔陶瓷膜。     

ZrO_2－TiO_2多孔陶瓷膜的制备研究

以Ｔｉ（ＯＣ４Ｈ９）４和Ｚｒ（ＮＯ３）４·５Ｈ２Ｏ为前驱物，用Ｓｏｌ－ｇｅｌ方法制备ＺｒＯ２－ＴｉＯ２多孔陶瓷膜，研究了不同Ｚｒ／Ｔｉ比和浓度对ＺｒＯ２－ＴｉＯ２干ｇｅｌ的影响．研究了不同Ｚｒ／Ｔｉ比和烧结过程对ＺｒＯ２－ＴｉＯ２多孔陶瓷膜结构的影响．制备出了孔径小（约１８ｎｍ）、孔径分布很窄、孔隙率较高（约３６％）、面积较大的ＺｒＯ２－ＴｉＯ２多孔陶瓷膜     

蓝宝石激光晶体中高纯掺钛材料Ti2O3的研制

以自制高纯ＴｉＯ２和高纯Ｈ２为原料,采用Ｈ２还原法制备高纯Ｔｉ２Ｏ３。研究了还原温度、Ｈ２流量,ＴｉＣｌ４浴温,ＴｉＯ２在恒温区中的位置对还原过程和Ｔｉ２Ｏ３产品质量的影响,摸索出了制备高纯Ｔｉ２Ｏ３的工艺条件,采用本工艺制备的Ｔｉ２Ｏ３,其纯度及批量均达到目前国内领先水平。     

蓝宝石激光晶体中高纯掺钛材料Ti_2O_3的研制

以自制高纯ＴｉＯ２和高纯Ｈ２为原料,采用Ｈ２还原法制备高纯Ｔｉ２Ｏ３（纯度＞９９．９９％）．研究了还原温度、Ｈ２流量、ＴｉＣｌ４浴温、ＴｉＯ２在恒温区中的位置对还原过程和Ｔｉ２Ｏ３产品质量的影响,摸索出了制备高纯Ｔｉ２Ｏ３的工艺条件．采用本工艺制备的Ｔｉ２Ｏ３,其纯度及批量均达到目前国内领先水平．     

纳米ZrO2—TiO2复合氧化物微粉的制备研究

研究了用水热法制备纳米ＺｒＯ２－ＴｉＯ２复合氧化物微粉。制备了ＺｒＯ２（Ｃ）－ＴｉＯ２（Ａ）。ＺｒＯ２（Ｃ）－ＴｉＯ２（Ｒ）,ＺｒＯ２（Ｔ）－ＴｉＯ２（Ａ）,ＺｒＯ２（Ｔ）－ＴｉＯ２（Ｒ）四组纳米复合氧化物及无定形的复合Ｚｒ－Ｔｉ水合氧化物。研究了它们的相变和可烧结性。经１４００℃烧结１０ｈ得到了具有９５％理论密度的ＺｒＴｉＯ４陶瓷。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has